Improvement in apparatus for stoning, glassing, and pebbling leather



H.- CUNNlNGH-AM. Improvement in Apparatus for Stonlng; G lassing, and

Pebbling Leather.

Patented Nov. 12, 1872..

vent-a)- AM. PHDTO-LITIIDERA PHIC Cll M If (OSBORNE S FRUBESS.)

ATENT FFICE' HENRY CUNNINGHAM, OF ALBANY, NE\V YORK.

IMPROVEMENT lN APPARATUS FOR STONING, GLASSING. AND PEBBLING LEATHER.

To all whom it may concern:

Be it known that I, HENRY CUNNINGHAM, of the city and county of Albany,State of New York, have invented certain new and embodying theimprovements in this invention. Fig. 2 is a vertical view of a sectionthrough the pitman and the improvements connected therewith. Fig. 3 is aside elevation of the pitman and the vibrating bars with theimprovements. Fig. iis a view from back of the tool-holder.

This invention relates to that class of ma chines used for stoning,glassing, and other operations on leather, which has a vibratingtool-bar coupled with a second bar in such a manner that when operatedby the usual pitman the tool will be lifted up from the table when thetool-bar is thown back and be cast down when thrown forward. It is wellknown by those who have operated this class of machines that, by reasonof the unequal thickness of the leather operated upon before beingshaved, the tool will catch on the material and become so set that itcannot be removed without great labor and loss of time. By my inventionthe tool can be thrown up immediately, at any time, so that all contactof the tool with the bed or table will be broken, and the tool, whenthrown in contact with the machine, will not pleat the leather, and willalso remove the usual wrinkles more readily than in machines now used.

To enable others skilled in the art to make and use my invention, I willproceed to describe it in reference to the drawing and let ters ofreference marked thereon, the same letters indicatinglike parts.

In the drawing, A represents the table. B is the bed, over which thetool works. 0 is any suitable frame or standard to which the severalparts of the machine are attached. D is the fly-wheel. F is the pitman.G is the vibrating tool-bar. H is the tripping-bar. I is the guide, allof which are old and have long been used. The vibrating tool G and thetripping bar I are connected at the top of the standard (J by means ofthe usual crosshead a, which swings on a pivot starting from thestandard 0. The lower ends of the said tool-bar H and tripping-bar I areconnected, by pivots c and c at the bottom, by the plates J J, Figs. 1',2, and 3. In other machines the said plate J J are bolted to the pitmanF in such a manner as to render them rigid. In my invention I dispensewith the said rigid bolting or securing of the said plates J, and attachthe said plates, a little past the center, to the said pitman at nearits end, by a pivot, e, which may consist of a round bolt, as shown inFigs. 2 and 3. The said plates J are also continued back of the pivot eon each side of the pitman F, and have their ends pivoted to thepitman-levers L L. The said pitman-levers L L are made connected infront, as shown in Figs. 1 and 2, and are so placed that each will facethe plates J J, and a portion of each side of the pitman F, as shown inFig. 2. The extreme back end of the said levers L L are pivoted to thepitman F at near the center of its length (as usually made) by the pivots. The said levers are at a distance of about ten inches forward of thesaid pivot s, pivoted to the plates J J by the pivots at, Figs. 1 and 2.Being thus arranged,

when the front connecting ends (I of the said levers are thown up, as inFig. 3, the pitman, with the plates J, will be made to result the sameas if they were made rigid; and when the ends are thrown down, as inFig. 2, and din Fig.3 in dotted lines, the said rigidity will be brokenand the pitman will become flexible. I also attach to the front of thetool-bar G, and about two feet above the line of the pitman F, a spring,M, which spring is provided on its lower end, about on a line with thepitman, with a catch, f, as in Figs. 1 and 3. The said spring M haspivoted in it, near the center of its length, a trigger-lever, g, whichtrigger-lever, when pulled in one direction, will throw the catch f offfrom the face of the tool-bar G, and, when thrown in the reverse, willpermit its return. To hold the stone or glass, or equivalent tool N, Iuse a toolholder, 1?, which I construct as follows: I make theattaching-plate h and front plate m and top plate at solid with eachother, as in Fig. 3. I then place back of the front plate m thebinding-plate 0, between which plates m 2 wearer and o the tool is to beplaced, and connect the said plate by means of the draw-bolts V V, Figs.Sand 4, which boltsV are to draw the said plates m and o (with the toolbetween) together; I also pierce the top plate n and furnish it with twoset-screws z z, Figs. 3 and 4, which set-screws pass down below thelower surface of the said top-plate a, and are to be used to set thesaid tool N down to the bed B, and hold it down firmly; and instead ofgiving the point of the said tool a cant b k t w rd the front of themachine, as is usually done, I give the said toola position parall withthe line of the toolbar G, as shown in Figso that when the said toolpasses over e le ther operated upon, it will not slip Over the wrinklestherein and cause a pleati g 0 t e leather, but will act so as to carryor wipe out the said wrinkles, as is desired.

The manner in which the several p rts Of this invention operate is asfollows: 711611 the levers L L, pivoted to the pitma a d to the plates JJ, are thrown up in a line With the said pitman, and the catch f is thowback so as to hold on the cross-connecting e s as in Fig. 3, the 'pitmanF and the plates J J will be made rigid, and the same as if the saidplates J J were firmly bolted to the said pitman at s and x and when thesaid levers L are thus thrown up and the whole is made rigid, asdescribed, the tool N will be in contact with the bed B in each forwardstroke; but when the trigger-lever g is pulled down, as shown in Fig. 1and by dotted lines in Fig. 3, the spring-catch f attached to the springM will be thrown out to a position, shown by dotted lines L L in Fig. 3,and the levers L will assume the position shown in Fig. 1 and by dottedlines L, Fig. 3, the contact of the tool N with the bed B will bebroken, and the 'tool will move clear of the same.

Having described my invention, What I claim, and desire to secure byLetters Patent, 1s

1. The plates J J, pivoted at e to the pitman F, and in combination withthe tool-bar G and tripping-bar H, substantially as and for the purposeset forth.

2. The combination of the pitinan-levers L L with the plates J J, whenthe said levers L are pivoted to the said plates J, substantially as andfor the purpose set forth.

3. The combination of the spring M, catch f, and trigger-lever g,substantially as and for the purpose set forth.

HENRY CUNNINGHAM.

\Vi tnesses:

ALEX. SELKIRK, DANIEL 0. Govner.

